Doctrine - Multiple models referencing same id field in another model

Question

I have a Files Model, and Multiple (currently 3) different other Models (Article, Job, Event) that can all have files, that are stored in the Files Model.

The problem is that when i generate the tables via the CLI-Tool (./doctrine build-all-reload), i get this error message:

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot 
add or update a child row: a foreign key constraint fails 
(`my_database/articles`, CONSTRAINT `articles_id_files_target_id`
FOREIGN KEY (`id`) REFERENCES `files` (`target_id`))

File is defined as (No relations are defined in this Model defined):

columns:
  id:
    primary: true
    autoincrement: true
    type: integer(4)
  target_id: integer(4)
  filename: string(255)
[...]

All 4 Models have this relation-definition:

  relations:
    Files:
      type: many
      class: File
      local: id
      foreign: target_id

This is the Php-Code that Doctrine generates (BaseFile.php):

public function setUp()
{
    parent::setUp();
    $this->hasOne('Publication', array(
         'local' => 'target_id',
         'foreign' => 'id'));

    $this->hasOne('Event', array(
         'local' => 'target_id',
         'foreign' => 'id'));

    $this->hasOne('Article', array(
         'local' => 'target_id',
         'foreign' => 'id'));

    $this->hasOne('Job', array(
         'local' => 'target_id',
         'foreign' => 'id'));
}

I understand why this happens (The Constraints can not be setup for multiple tables), but have no idea how i could solve this problem without mutltiple file tables or an association table.

Is there a way to tell Doctrine that it should not create the relations in the File model?

Any good ideas?